Numerical simulation of circulation of steam-air mixture and film condensation on series of vertical tubes

The paper presents results of 3D steady-state RANS computations of turbulent convection of steam-air mixture performing a circulating motion in a confined enclosure under conditions of film condensation of steam on an infinite row of cooled vertical tubes located in the central part of enclosures. The aim of the computations is to study the influence of the distance between the tubes on the flow structure and heat transfer characteristics. Software implementation of the presented mathematical model of the processes under consideration has extended the possibilities of the in-house CFD-code SINF. On the base of the obtained computational results a comprehensive analysis of the structure of the velocity, temperature and concentration fields, as well as the distribution of the heat flux on the surfaces of the tubes is done.